设lim(x->无穷大)((1+x^2+x^3)^1/3-ax-b)=0,求a= ,b= .

lim(x->无穷大){(2^x-3^x)/2}^(1/x) lim x->正无穷大 x ( sqrt(x^2+1)-x ) lim(x趋向无穷大)[1+2/(x+2)]^(x+2) lim x趋向无穷大 (1+2/x)^x=? lim（x/（1+x^2））,x趋向无穷大 设lim（(x^2+1)/(x+1) -ax-b）=0,求a,b.x趋向无穷大 设lim（(x^2+1)/(x+1) -ax-b）=0,求a,b. x趋向无穷大 设lim(x->无穷大)((1+x^2+x^3)^1/3-ax-b)=0,求a= ,b= . lim->无穷大（1-2/x)^(x/2-1) 为什么lim(x->无穷大)(1-2/x)^(-1) 等于1 lim (1+2/x)^2 x→无穷大 lim(x->无穷大)x/(sinx)^2=? lim（x-3/x+1）^x lim趋向无穷大 高数题 lim(x-无穷大) x cos 1/x lim(x~无穷大) Xcos 1/X 1、lim(x->无穷大) e^x arctanx2、lim(x->0)sinx√1+sin(1/x)3、lim(x->无穷大)【（√x^2+x+1）-【(√x^2-x+1)】4、lim(x->无穷大)((x+{x+(x)^0.5]^0.5}^0.5)/(2x+1)^0.55、lim(x->0)(sin3x+x^2sin1/x)/((1+cosx)x)6、lim(n->无穷大)(2^n)(si x无穷大 f(x)与1/2x 等价无穷小 那么lim x无穷大 sin(1/x)/f(x)为. lim 1/(sinx)^2-1/xsinx,x趋近无穷大 lim((√1+x^2)+x)/((√x^3+x)-x)x→+无穷大